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use crate::{implementation, private, Asserter};
use std::fmt::Debug;
/// Specifies various equality assertions. Implemented on [`Asserter`]
///
/// This trait is sealed and cannot be implemented outside Smoothy.
pub trait EqualityAssertion<AssertedType>: private::Sealed
where
AssertedType: PartialEq,
{
// NOTE: the type inference for {integers} is bad as i32 does not implement Into<u16>
/// Asserts that the assertable is equal to the expected value.
///
/// This is done by transforming the expected-value to an instance of `AssertedType` by using the [Into]-trait
/// and then comparing both values with [`PartialEq`]
///
/// # Examples
/// ```
/// use smoothy::prelude::*;
///
/// assert_that(String::from("Hello World!")).equals("Hello World!");
/// ```
///
/// # Panics
/// When the values are not matching according to [`PartialEq`]
#[track_caller]
fn equals(self, expected: impl Into<AssertedType>) -> Asserter<AssertedType>
where
AssertedType: Debug;
// NOTE: the type inference for {integers} is bad as i32 does not implement Into<u16>
/// Asserts that the assertable is *not* equal to the expected value.
///
/// This is done by transforming the expected-value to an instance of `AssertedType` by using the [Into]-trait
/// and then comparing both values with [`PartialEq`]
///
/// # Examples
/// ```
/// use smoothy::prelude::*;
///
/// assert_that(String::from("Hello World!")).not_equals("Hello There!");
/// ```
///
/// # Panics
/// When the values are matching according to [`PartialEq`]
#[track_caller]
fn not_equals(self, expected: impl Into<AssertedType>) -> Asserter<AssertedType>
where
AssertedType: Debug;
/// Asserts that the assertable is equal to the expected value.
///
/// This is done by transforming the expected-value to an instance of `AssertedType` by using the [`TryInto`]-trait
/// and then comparing both values with [`PartialEq`]
///
/// # Examples
/// ```
/// use smoothy::prelude::*;
///
/// assert_that(42u8).try_into_equals(42i8);
/// ```
///
/// # Panics
/// When the transformation fails or the values are not matching according to [`PartialEq`]
#[track_caller]
fn try_into_equals<T>(self, expected: T) -> Asserter<AssertedType>
where
AssertedType: Debug,
T: TryInto<AssertedType>,
<T as TryInto<AssertedType>>::Error: Debug;
/// Asserts that the assertable is *not* equal to the expected value.
///
/// This is done by transforming the expected-value to an instance of `AssertedType` by using the [`TryInto`]-trait
/// and then comparing both values with [`PartialEq`]
///
/// # Examples
/// ```
/// use smoothy::prelude::*;
///
/// assert_that(42u8).try_into_not_equals(100i8);
/// ```
///
/// # Panics
/// When the transformation fails or the values are matching according to [`PartialEq`]
#[track_caller]
fn try_into_not_equals<T>(self, expected: T) -> Asserter<AssertedType>
where
AssertedType: Debug,
T: TryInto<AssertedType>,
<T as TryInto<AssertedType>>::Error: Debug;
/// Asserts that the assertable is equal to the expected value while having the same type.
///
/// # Examples
/// ```
/// use smoothy::prelude::*;
///
/// assert_that("Hello World!").is("Hello World!");
/// ```
///
/// # Panics
/// When the values are not matching.
#[track_caller]
fn is(self, expected: AssertedType) -> Asserter<AssertedType>
where
AssertedType: Debug;
/// Asserts that the assertable is *not* equal to the expected value while having the same type.
///
/// # Examples
/// ```
/// use smoothy::prelude::*;
///
/// assert_that("Hello World!").is_not("Hello There!");
/// ```
///
/// # Panics
/// When the values are matching.
#[track_caller]
#[allow(clippy::wrong_self_convention)]
fn is_not(self, expected: AssertedType) -> Asserter<AssertedType>
where
AssertedType: Debug;
}
impl<AssertedType> EqualityAssertion<AssertedType> for Asserter<AssertedType>
where
AssertedType: PartialEq,
{
fn equals(self, expected: impl Into<AssertedType>) -> Self
where
AssertedType: Debug,
{
let transformed_expected: AssertedType = expected.into();
implementation::assert_equals(&self.value, transformed_expected);
self
}
fn not_equals(self, expected: impl Into<AssertedType>) -> Self
where
AssertedType: Debug,
{
let transformed_expected: AssertedType = expected.into();
implementation::assert_not_equals(&self.value, transformed_expected);
self
}
fn try_into_equals<T>(self, expected: T) -> Self
where
AssertedType: Debug,
T: TryInto<AssertedType>,
<T as TryInto<AssertedType>>::Error: Debug,
{
let conversion_result: Result<AssertedType, _> = expected.try_into();
implementation::assert_no_expected(
conversion_result.is_ok(),
&conversion_result,
"to be a successful conversion",
);
#[allow(clippy::unwrap_used)]
let expected = conversion_result.unwrap();
implementation::assert_equals(&self.value, expected);
self
}
fn try_into_not_equals<T>(self, expected: T) -> Self
where
AssertedType: Debug,
T: TryInto<AssertedType>,
<T as TryInto<AssertedType>>::Error: Debug,
{
let conversion_result: Result<AssertedType, _> = expected.try_into();
implementation::assert_no_expected(
conversion_result.is_ok(),
&conversion_result,
"to be a successful conversion",
);
#[allow(clippy::unwrap_used)]
let expected = conversion_result.unwrap();
implementation::assert_not_equals(&self.value, expected);
self
}
fn is(self, expected: AssertedType) -> Self
where
AssertedType: Debug,
{
implementation::assert_equals(&self.value, expected);
self
}
fn is_not(self, expected: AssertedType) -> Self
where
AssertedType: Debug,
{
implementation::assert_not_equals(&self.value, expected);
self
}
}